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Effect of methyl substituents on the NMR spectra of aromatic protons of some nitrobenzene derivatives

✍ Scribed by Paolo Beltrame; Paolo Carniti; Adolfo Lai; Paolo Viglino

Publisher
John Wiley and Sons
Year
1975
Tongue
English
Weight
176 KB
Volume
7
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

Proton NMR spectra were recorded and analysed for 1‐bromo‐4‐nitrobenzene, 2‐bromo‐5‐nitroluene, 3‐bromo‐6‐nitrotoluene and 2‐bromo‐5‐nitro‐p‐xylene, as well as for the corresponding compounds having p‐CH~3~C~6~H~4~S in place of Br. Chemical shifts and coupling constants generally agree with expected values; however, a deshielding effect of the methyl group on aromatic protons was observed in one case.

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